Chris@16: // Copyright David Abrahams 2002.
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: #ifndef OBJECT_SLICES_DWA2002615_HPP
Chris@16: # define OBJECT_SLICES_DWA2002615_HPP
Chris@16: 
Chris@16: # include <boost/python/detail/prefix.hpp>
Chris@16: 
Chris@16: # include <boost/python/proxy.hpp>
Chris@16: # include <boost/python/object_core.hpp>
Chris@16: # include <boost/python/object_protocol.hpp>
Chris@16: # include <boost/python/handle.hpp>
Chris@16: # include <utility>
Chris@16: 
Chris@16: namespace boost { namespace python { namespace api {
Chris@16: 
Chris@16: struct const_slice_policies
Chris@16: {
Chris@16:     typedef std::pair<handle<>, handle<> > key_type;
Chris@16:     static object get(object const& target, key_type const& key);
Chris@16: };
Chris@16:   
Chris@16: struct slice_policies : const_slice_policies
Chris@16: {
Chris@16:     static object const& set(object const& target, key_type const& key, object const& value);
Chris@16:     static void del(object const& target, key_type const& key);
Chris@16: };
Chris@16: 
Chris@16: template <class T, class U>
Chris@16: inline slice_policies::key_type slice_key(T x, U y)
Chris@16: {
Chris@16:     return slice_policies::key_type(handle<>(x), handle<>(y));
Chris@16: }
Chris@16:     
Chris@16: //
Chris@16: // implementation
Chris@16: //
Chris@16: template <class U>
Chris@16: object_slice
Chris@16: object_operators<U>::slice(object_cref start, object_cref finish)
Chris@16: {
Chris@16:     object_cref2 x = *static_cast<U*>(this);
Chris@16:     return object_slice(x, api::slice_key(borrowed(start.ptr()), borrowed(finish.ptr())));
Chris@16: }
Chris@16: 
Chris@16: template <class U>
Chris@16: const_object_slice
Chris@16: object_operators<U>::slice(object_cref start, object_cref finish) const
Chris@16: {
Chris@16:     object_cref2 x = *static_cast<U const*>(this);
Chris@16:     return const_object_slice(x, api::slice_key(borrowed(start.ptr()), borrowed(finish.ptr())));
Chris@16: }
Chris@16: 
Chris@16: template <class U>
Chris@16: object_slice
Chris@16: object_operators<U>::slice(slice_nil, object_cref finish)
Chris@16: {
Chris@16:     object_cref2 x = *static_cast<U*>(this);
Chris@16:     return object_slice(x, api::slice_key(allow_null((PyObject*)0), borrowed(finish.ptr())));
Chris@16: }
Chris@16: 
Chris@16: template <class U>
Chris@16: const_object_slice
Chris@16: object_operators<U>::slice(slice_nil, object_cref finish) const
Chris@16: {
Chris@16:     object_cref2 x = *static_cast<U const*>(this);
Chris@16:     return const_object_slice(x, api::slice_key(allow_null((PyObject*)0), borrowed(finish.ptr())));
Chris@16: }
Chris@16: 
Chris@16: template <class U>
Chris@16: object_slice
Chris@16: object_operators<U>::slice(slice_nil, slice_nil)
Chris@16: {
Chris@16:     object_cref2 x = *static_cast<U*>(this);
Chris@16:     return object_slice(x, api::slice_key(allow_null((PyObject*)0), allow_null((PyObject*)0)));
Chris@16: }
Chris@16: 
Chris@16: template <class U>
Chris@16: const_object_slice
Chris@16: object_operators<U>::slice(slice_nil, slice_nil) const
Chris@16: {
Chris@16:     object_cref2 x = *static_cast<U const*>(this);
Chris@16:     return const_object_slice(x, api::slice_key(allow_null((PyObject*)0), allow_null((PyObject*)0)));
Chris@16: }
Chris@16: 
Chris@16: template <class U>
Chris@16: object_slice
Chris@16: object_operators<U>::slice(object_cref start, slice_nil)
Chris@16: {
Chris@16:     object_cref2 x = *static_cast<U*>(this);
Chris@16:     return object_slice(x, api::slice_key(borrowed(start.ptr()), allow_null((PyObject*)0)));
Chris@16: }
Chris@16: 
Chris@16: template <class U>
Chris@16: const_object_slice
Chris@16: object_operators<U>::slice(object_cref start, slice_nil) const
Chris@16: {
Chris@16:     object_cref2 x = *static_cast<U const*>(this);
Chris@16:     return const_object_slice(x, api::slice_key(borrowed(start.ptr()), allow_null((PyObject*)0)));
Chris@16: }
Chris@16: # if !defined(BOOST_MSVC) || BOOST_MSVC > 1300
Chris@16: template <class U>
Chris@16: template <class T, class V>
Chris@16: inline const_object_slice
Chris@16: object_operators<U>::slice(T const& start, V const& end) const
Chris@16: {
Chris@16:     return this->slice(
Chris@16:         typename slice_bound<T>::type(start)
Chris@16:         , typename slice_bound<V>::type(end));
Chris@16: }
Chris@16: 
Chris@16: template <class U>
Chris@16: template <class T, class V>
Chris@16: inline object_slice
Chris@16: object_operators<U>::slice(T const& start, V const& end)
Chris@16: {
Chris@16:     return this->slice(
Chris@16:         typename slice_bound<T>::type(start)
Chris@16:         , typename slice_bound<V>::type(end));
Chris@16: }
Chris@16: # endif 
Chris@16: 
Chris@16: 
Chris@16: inline object const_slice_policies::get(object const& target, key_type const& key)
Chris@16: {
Chris@16:     return getslice(target, key.first, key.second);
Chris@16: }
Chris@16: 
Chris@16: inline object const& slice_policies::set(
Chris@16:     object const& target
Chris@16:     , key_type const& key
Chris@16:     , object const& value)
Chris@16: {
Chris@16:     setslice(target, key.first, key.second, value);
Chris@16:     return value;
Chris@16: }
Chris@16: 
Chris@16: inline void slice_policies::del(
Chris@16:     object const& target
Chris@16:     , key_type const& key)
Chris@16: {
Chris@16:     delslice(target, key.first, key.second);
Chris@16: }
Chris@16: 
Chris@16: }}} // namespace boost::python::api
Chris@16: 
Chris@16: #endif // OBJECT_SLICES_DWA2002615_HPP